добавил api клиент, исправил стор, слайсы для продуктов и категорий

front/src/app/store.ts

@@ -1,5 +1,7 @@
 import { configureStore } from "@reduxjs/toolkit";
-import catalogReducer from "../features/catalog/catalogSlice";
+import catalogReducer from "../features/catalog/productsSlice";
+import categoriesReducer from "../features/catalog/categoriesSlice"
+import productsReducer from "../features/catalog/productsSlice"
 
 export const store = configureStore({
   reducer: {